|
StianSøiland
stian at soiland.no
Mon Jan 19 21:23:43 EST 2004
On 2004-01-19 12:21:01, Kamil Niechajewicz wrote:
> i have a problem with the first case. when user submits a form,
> i go to url /add, do what i want to do and then i send a location
> header which redirects me to /index. but when i do this, browser
> asks me whether i want to repost my submitted form to this
> new url (/index). is there any way to redirect totally
> transparently for user, so that browser won't ask this question?
Yes, the problem is that you use the Location-header. Sending this
header as a response to a POST-request asks the browser to go somewhere
else with his form posting.
Here is a function we're using:
def redirect(req, url, temporary=False, seeOther=False):
"""
Immediately redirects the request to the given url. If the
seeOther parameter is set, 303 See Other response is sent, if the
temporary parameter is set, the server issues a 307 Temporary
Redirect. Otherwise a 301 Moved Permanently response is issued.
"""
from mod_python import apache
if seeOther:
status = apache.HTTP_SEE_OTHER
elif temporary:
status = apache.HTTP_TEMPORARY_REDIRECT
else:
status = apache.HTTP_MOVED_PERMANENTLY
req.headers_out['Location'] = url
req.status = status
raise apache.SERVER_RETURN, status
Using seeOther should work for POST-requests, making the browser
following the new link with GET, and without the form data.
Quoting RFC2068 (HTTP 1.1):
10.3.4 303 See Other
The response to the request can be found under a different URI and
SHOULD be retrieved using a GET method on that resource. This method
exists primarily to allow the output of a POST-activated script to
redirect the user agent to a selected resource. The new URI is not a
substitute reference for the originally requested resource. The 303
response is not cachable, but the response to the second (redirected)
request MAY be cachable.
If the new URI is a location, its URL SHOULD be given by the Location
field in the response. Unless the request method was HEAD, the entity
of the response SHOULD contain a short hypertext note with a
hyperlink to the new URI(s).
If this doesn't work, try the slightly more hackish:
req.headers_out['Refresh'] = "0; url=http://something"
--
Stian Søiland Work toward win-win situation. Win-lose
Trondheim, Norway is where you win and the other lose.
http://www.soiland.no/ Lose-lose and lose-win are left as an
exercise to the reader. [Limoncelli/Hogan]
|